Based on the Platinum Studios Comics graphic novel written by Fred Van Lente and Andrew Foley, the sci-fi Western explores what would happen if the traditional Old West enemies — cowboys and Native Americans — found the prairie attacked by aliens in mid-1800s Arizona.

The DreamWorks and Universal movie is targeting a July 29, 2011 release. Alex Kurtzman, Roberto Orci and Damon Lindelof wrote the script.